Njengoba sazi, izinguzunga zeqhwa Yiziqu ezinkulu ezinkulu futhi ezinkulu zeqhwa ezakha ebusweni bomhlaba ngenxa yokuqongelela, ukuminyana kanye nokufakwa kwekhephu ngemuva kweminyaka eminingi lishonile. Namuhla sizokhuluma ngengxenye ethokozisayo yezinguzunga zeqhwa. Imayelana ne- isekisi leqhwa. Ukubaluleka kwezinguzunga zeqhwa kuya ngokuya kufaneleka kakhulu esimweni sokuguquka kwesimo sezulu esizithola sikuso.
Kulesi sihloko sizochaza ukuthi liyini isekisi le-glacial nokuthi libaluleke kangakanani.
Amandla weqhwa
Ukuze siqonde ukuthi i-glacial cirque iyini, kufanele siqale sazi ukuthi i-glacier yakhiwa kanjani. Lapho inani lamanzi elihwamukayo ehlobo lidlulwa yiqhwa laminyaka yonke isenzo siqala ukuncibilika. Ukuze kwakhiwe izinguzunga zeqhwa kufanele kube nokulinganisela okuhle kwenani leqhwa elibekwe ebusweni bomhlaba ngokungafani nenani leqhwa elincibilikayo noma elihwamukayo.
Kunezinhlobonhlobo zezinguzunga zeqhwa emhlabeni wonke. Phakathi kohlobo ngalunye lweqhwa, izinhlobo ezahlukahlukene zingahlukaniswa. Ngokwesibonelo, Kukhona izinguzunga zeqhwa ezinezigodi, i-niche, ubujamo benkundla yeqhwa, njll. Izimo zezulu esizitholayo nazo zinquma izici uma kukhulunywa ngokubona ukwakheka kweqhwa. Lezi zimo kungaba ezishisayo, ezipholile, noma ezibandayo. Izimo ezishisayo zithonya inani leqhwa eliqongelela noma elincibilikayo. Ngokuya ngamazinga okushisa aphakathi nendawo esiwathola endaweni enenguzunga yeqhwa, singaba nokuqongelela okukhulu kweqhwa nokuxinana okukhulu kunalokho uma amazinga okushisa ehla enyuka kakhulu.
Okwamanje, I-10% yobuso beplanethi yethu imbozwe izinguzunga zeqhwa. Ezikhathini zasendulo zokwakheka komhlaba yayimbozwe ngama-30%. Kungashiwo ukuthi yisici sendawo esiqoqa inani elikhulu lamanzi ahlanzekile emhlabeni. Ngakho-ke ingozi yokusebenza kwayo okuseduze noma, ngakho-ke, ukwanda kolwandle.
I-84% yayo yonke indawo egcwele izinguzunga zeqhwa ise-Antarctica, kanti enye ihlukaniswe yaba yiGreenland nezinye izindawo ezineqhwa zeplanethi.
Yini isekisi leqhwa
Manje njengoba sesikhumbule ukuthi amandla eqhwa asebenza kanjani, sesingangena ngokuphelele ku-glacial cirque. Isekisi leqhwa i-circus glacier is uhlobo lomcengezi onamadwala anomumo oyindilinga Kubangelwa ukushelela okuqhubekayo noma ukuxubha noma iqhwa ngesivumelwano noma endaweni yalo yokuqongelela noma yokondla. Indawo enqwabelana yeqhwa yingxenye lapho inani leqhwa elibekiwe likhulu kakhulu kunalelo elincibilikayo. Ngakolunye uhlangothi, sinendawo yokuhuzuka lapho izinga lokuncibilika liphakeme kunezinga lokuqongelela.
I-cirque ye-glacial imvamisa isesimweni se-amphitheatre noma esihlalweni esinezinhlangothi eziphakeme noma imiphetho emile ezungezayo. I-glacial cirque imvamisa inezingxenye ezimbili ezingahlukaniswa kalula. Sinengxenye ehlukaniswe ngu ukuqhekeka okubizwa ngokuthi i-rimaya eguqukayo noma evundlile: lapha sithola ingxenye engezansi, okuyilapho iqhwa eliningi neqhwa liqoqeka khona. Ingxenye engenhla, ngakolunye uhlangothi, inemithambeka emikhulu kakhulu futhi iqhwa licindezelwe kakhulu ngenxa yezinga lokushisa eliphansi.
Singathola futhi indawo ye-ablation ku-glacial cirque. Le ndawo yilapho inqubo yokuncibilika, ukunwetshwa nokuhlukaniswa kobuningi beqhwa yenzeka lapho ingena olwandle.
Izici ze-glacier cirque
Yize kunezinhlobonhlobo eziningi zama-glacial cirque, onke abonakala ngokuba nezici ezithile ze-morphological ezisivumela ukuthi sihlukanise lezo zamabheshi okwamukela emifudlaneni yezintaba. Phakathi kwezici eziyinhloko sinezindonga zalo ezingenhla. Zitholakala ngaphezu kwe-bergschrund yeqhwa elidala. Lezi zindonga azikhawulwanga noma zabhujiswa ukuhuzuka kweqhwa. Imithambeka yayo iminyene kakhulu kanti nobuso bayo abujwayelekile ngenxa yokuwa kwamabhulokhi eqhwa azonamathela edwaleni.
Ngakolunye uhlangothi, sinendawo engezansi ye-glacial cirque. Inentaba ephansi kakhulu kunaleyo enezindonga. Kulesi sizinda singathola amadwala ahlukahlukene anodaka asuswe amandla ezulu. Kwesinye isikhathi, singathola nezintambo ze-moraine ezihambisanayo nesiqondiso somthambeka. Phansi kwesekisi kungaba okwenziwe ngomcengezi noma ngokuvundlile. Ngaphezu kwalokho, Ngokuya ngobunjalo bazo, zingaba namachibi weqhwa owodwa noma amaningi.
Emasekisini amiswe njengendawo yemidlalo yezemidlalo, ingxenye yesiphambano inesigaba esime njengo-U. Ngezansi konqenqema olungaphansi lwesekisi siyabona ukuthi umthambeka ugcizelelwa kanjani ukumaka ukuqala kwesigodi seqhwa.
Noma kungabonakali, ijikijolo libaluleke kakhulu ku-glacial cirque. Kuyisiqhuma esivundlile esakha eqhweni ezinhlangothini ze-glacial cirque. Lesi sifantu sinomthwalo wokwehlukanisa iqhwa elingaguquguquki elinamathele emadwaleni asentabeni neqhwa elihambayo leqhwa uqobo lwalo.
Leli berry livula futhi liveze idwala eliphakeme ekuqaleni kwehlobo. Lokhu kungenxa yamazinga okushisa aphezulu nokuqala kokuncibilika kweqhwa. Itshe lichayeka ekushintsheni kwezinga lokushisa emini nasebusuku. Lemijikelezo ephindaphindwayo yokubandayo nokuncibilika, ngaphansi kwesenzo seqhwa, kubangela ukuthi idwala libhidlike kancane kancane futhi libangele amadwala aphezulu ukuba awe. Yile ndlela amadwala athatha ngayo ukwakheka okungajwayelekile futhi kucishe kubheke phezulu.
Le mizila yokuqandisa iqhwa iphazanyiswa ukuguquka kwesimo sezulu. Ingxenye encibilikayo iyanda kakhulu kunenani lemvula ngesimo seqhwa elinganqwabelana ngokwazisa ngeqhwa.
Ngiyethemba ukuthi ngalolu lwazi ungafunda kabanzi mayelana nesekisi leqhwa.